International & Great Northern / Kansas City, Watkins & Gulf / Kansas City, Wyandotte & Northwestern / Little Rock & Fort Smith / Missouri Pacific / Saint Louis, Brownsville & Mexico / Saint Louis, Iron Mountain & Southern 4-6-0 "Ten-Wheeler" Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class 1101 / 1601 (Locobase 10051)

Data from MP 1924 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers 3744-3751 in January 1901; 3786-37 in March 1901.

The first 14 of this class -- originally numbered in the 1100s -- had piston valves; the latter 15 -- 1601-1615 -- were equipped with slide valves. These were the last of the MoPac's passenger Ten-wheelers and they operated until the mid-1930s.


Class 111/421/2806 (Locobase 10042)

Data from MP 1924 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 2568-2570 in January 1880; 2571 in February; 2666-2667, 2671-2672, 2676 in December; 2772-2776, 2779 in July 1881; 3121-3122 in October 1882

Classic early-80s Ten-wheeler with the dome right over the firebox and the firebox shoved down between the 2nd and 3rd axles.


Class 14 (Locobase 10041)

Data from MP 1924 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 14, p. 249. Works numbers were 9764-9765 in January 1889.

This pair of small Ten-wheelers served the KC, W & NW for several years. The railway extended northwest from Kansas City in the direction of the Black Hills of South Dakota as far as Virginia City, Nebraska, where it connected with the Rock Island.

Unfortunately for its backers, the railway failed and was bought up by the Jay Gould-controlled Missouri Pacific in 1894. At that point it was renamed simply Kansas City Northwestern. Its fortunes never really improved and the line was abandoned in October 1919 and its rails actually taken up some time in the 1920s.

As for the pair of Ten-wheelers described here, they shed a few tubes in a later rebuilding, winding up with 225.


Class 17 (Locobase 11865)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 13, pp.141 & 194. Works numbers were 8248 in November 1886 and 8415 in March 1887.


Class 21 (Locobase 11690)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 16, p. 25. Works numbers were 10812 and 10814 in April 1890.

This pair of Ten-wheelers preceded a larger class that went to the Missouri Pacific later in the year (Locobase 10039). Delivered with 20" (508 mm) cylinders, but soon reduced to 18" (457 mm). Very soon after the two engines arrived on the KCW&NW, they were sold in 1891 as a set to the Chicago & Grand Trunk as their class A1 and renumbered 152-153. The two were renumbered 1241-1242 in 1898-1891 and 1287-1288.

After the Grand Truck was absorbed by the Canadian National in 1920, the 1288 was scrapped, but 1287 was redesignated G-19-a in 1923 and renumbered 1167.


Class 21 / C-3-D (Locobase 12712)

Data from DeGolyer, Volume 27, p. 29. Works numbers were 24144, 24148, 24163 in April 1906; 24189, 24195 in May.

This quintet of Ten-wheelers soon went to the Trinity & Brazos Valley as a class in 1907, were renumbered, and operated on that road for decades. The Boll Weevil scrapped the 54 in June 1929, then suffered its own transformation in 1930 as it was reorganized as the Burlington-Rock Island. The class shrank as 56 was scrapped in 1931, 55 in 1937, 53 in 1939, and 52 in 1944.


Class 2501 (Locobase 10035)

Data from MP 1924 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

This class of Rogers engines had a good deal more heating surface area than the 1893 Rogers engines supplied to the International Great Northern (Locobase 6893).


Class 2516 (Locobase 10036)

Data from MP 1924 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

Somehow, Cooke's decade of locomotives (works #2402-2411) were built to the same specifications as the Rogers engines of the same year (Locobase 10035), but ended up with a slightly lower tube heating surface. Otherwise the designs were identical.


Class 3/2832 (Locobase 10043)

Data from MP 1924 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 4630 and 4701 in May 1892 and 4844-4845 in April 1893.

Bought by the MP in 1910, this locomotive had entered service in 1892. A decade after its arrival, the KCW&G became the St Louis, Watkins & Gulf in June 1902. In 1909, the StLW&G came into the Missouri Pacific.

NB: EHS is tube heating surface only.


Class 629 / 2702 / TN-61 (Locobase 10040)

Data from MP 1924 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 14, p. 248. Works numbers were 9766, 9768-9769, 9771, 9774, 9777 in January 1889; 10067, 10069-10070, 10072-10073, 10076-10078 in June; 10103, 10106, 10108-10111, 10114 in July; 10160, 10162, 10165, 10169, 10254-10255, 10262, 10265, 10297, 10303 in August; 11408 in November 1890; and, 11414-11416 in December.

Thirty Ten-wheelers of a basic Baldwin design. They were delivered with 256 tubes, safety valves set at 130 psi, and a long, shallow firebox. A later update that may have included a new boiler had two fewer tubes.

2701 was sold to the New Orleans & Lower Coast in the 1920s. 2702 operated on the St 2736 later went to the Arkansas Railroad, then the Cadiz Railroad in Missouri where it operated as #12 until March 1953.


Class 668/TN-56 - 2626 (Locobase 10038)

Data from MP 1924 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 18, p. 10. Works numbers were 12738-12740, 12744, 12746-12749, 12755-12759, 12767-12768, 12771-12773, 12778-12780, 12782-12784, 12790-12791 in June 1892; 12799-12801, 12810, 12815, 12816, 12822 in July.

In the Baldwin specs, the tender's capacity amounted to 3,600 US gallons (13,626 litres), firebox heating surface area was 128.8 sq ft (11.97 sq m), and driver diameter measured 55" (1,397 mm).

The Graysonia Nashville & Ashdown first leased the 2630, then bought it outright in July 1930.

2635 and 2640 were sold to the New Orleans & Lower Coast, which was formed in 1916 as an MP subsdiary; it ran over 59.7 miles (96 km) of road in 1926.

2641 went to Meramec Portland Cement of St Louis.

2652 joined the Minneapolis Northfield & Southern.

2644 received 61" drivers, then was sold to the Cassville & Exeter. The C & E (see []), originally known as the Cassville & Western and located in Missouri, was recognized at one point by Ripley's Believe It or Not as the shortest railroad in America at 4.8 miles. 2644 came to the C & E in 1946 when Ray Dingler made one last effort to continue railroading, but a 1949 ice storm wrecked any real chance of success and the railroad closed soon after.


Class 7701 (Locobase 10052)

Data from MP 1924 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

Although virtually identical to the MP engines delivered a year earlier (Locobase 10035) by the same builder, these had a clerestory in the cab and taller drivers.


Class T 17/24 64B (Locobase 6786)

Data from IGN 2 - 1923 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. Works numbers were 530-536 in November 1881 and 537-539 in December.

Ten-wheelers that were rated for passenger and freight.For some reason, some of the class had the dome on the conical section of the boiler and others over the firebox. The tender's oil-fuel capacity was rated at 35 barrels (1,470 US gallons).


Class T 18/24 86D (Locobase 6890)

Data from IGN 2 - 1923 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

These Ten-wheelers looked bigger than they were. In fact, they're about the same size as the I & GN's 4-4-0s. Locobase supposes that the design's intent was to put more adhesive weight on relatively light rail. Thus, the boiler the direct heating surface were small and the grate only average for a 4-6-0, but suitable for the light-density duty they must have undertaken. The tender's oil-fuel capacity was rated at 44 barrels (1,848 US gallons).


Class T 18/24 96E (Locobase 6891)

Data from IGN 2 - 1923 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

Two years after the Schenectady Ten-wheelers, the I & GN took delivery of these larger examples from one of the Paterson, New Jersey builders. The grate's width spanned the distance between the rear two driving axles, but rested over them. Note the large amount of direct heating surface. As with most 1890s American locomotives, the considerable girth of the boiler at the firebox and steam dome end tapered sharply to a much smaller tube-filled course forward. The tender's oil-fuel capacity was rated at 44 barrels (1,848 US gallons).

By the time of the IGN's diagram book publication date, two of the class had been converted to 0-6-0 switchers. This entailed deleting the leading truck and shifting the three driving axles forward. At least three others were superheated; see Locobase 6892.


Class T 18/24 96Es (Locobase 6892)

Data from IGN 2 - 1923 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

Three of the Cooke Ten-wheelers delivered in 1892 and described in Locobase 6891 received a new, superheated boiler and 8" piston valves for their cylinders. The percentage of superheated surface is relatively generous for such conversions. The enhanced boiler, coupled with an atypical increase in boiler pressure, conferred not just greater tractive effort but appreciably more power at speed.


Class T 18/28 88J (Locobase 6898)

Data from IGN 2 - 1923 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

Among the dozens of mixed-traffic Ten-wheelers running on the I & GN were these higher-drivered passenger types from Cooke (builder's numbers 2730-2735). Notice the relatively long stroke for such a small cylinder diameter. The tender's oil-fuel capacity was rated at 60 barrels (2,520 US gallons).

It's not clear whether any of these were ever superheated..


Class T 19/24 104K (Locobase 6900)

Data from IGN 2 - 1923 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

This sextet was based on the Cooke passenger engines of a year earlier (Locobase 6898), but had smaller drivers. The tender's oil-fuel capacity was rated at 62 barrels (2,604 US gallons).


Class T 19/24 118H (Locobase 6899)

Data from IGN 2 - 1923 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

Cooke (builder's numbers 2667-2671, 2703-2707) supplied these low-drivered Ten-wheelers to the I & GN in the same year the company produced the 6 passenger engines shown in Locobase 6898. The tender's oil-fuel capacity was rated at 60 barrels (2,520 US gallons).


Class T 19/24 98F (Locobase 6893)

Data from IGN 2 - 1923 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

Near the end of the 19th Century, the pre-eminent Paterson builder received a sizable order for engines with the same firebox dimensions as the 1893 Cookes (Locobase 6891), but which heated a larger boiler. The tender's oil-fuel capacity was rated at 60 barrels (2,520 US gallons).

These do not seem to have been rebuilt with superheaters later on.


Class T 20/28 130 - 1909, 1911 (Locobase 13792)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 38, p.206 and 213. Works numbers were 33542-33546 in July 1909; 36825-36826 in August 1911; 36901-36907 in September.

The Baldwin spec says that the details of these two batches of engines and tenders were "..to be exact duplicate of ...Brooks Works Locos. 45609-45618 [Locobase 6896]...unless otherwise specified." When the two sets are compared, the firebox heating surface area of the Baldwins was quite a bit smaller. The 1911 locomotives were delivered as oil burners.

Both these engines and the Brooks were superheated to a common standard; see Locobase 6897.


Class T 20/28 130G (Locobase 6894)

Data from "Rogers' Ten-Wheeler," Locomotive Engineering (December 1900), p. 509.and from IGN 2 - 1923 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

At the turning of the century, Rogers supplied 6 relatively large Ten-wheelers to the Calvert, Waco & Brazos Valley. The C W & BV had a relatively short independent existence as a railroad, having been chartered on 28 June 1899 and acquired by the International Great Northern, 12 February 1901, and merged 1 May 1901.

The inherited sextet's design set the pattern for the most numerouse I & GN class as Cooke followed with 11 more in 1901 and 15 more in 1903 (builders' # for the latter batch were 26695-26700, 27243-27252). Baldwin added 10 more in 1906 with a slightly smaller amount of EHS (2,473 sq ft including 254 sq ft of direct heating surface). The tender's oil-fuel capacity was rated at 60 barrels (2,520 US gallons).

As well as putting 16 more tons of adhesion on the rails than earlier I & GN engines from the same builders, these locomotives had more than proportionately bigger boilers that proved suitable for superheating later. See Locobase 6895 for the result.


Class T 20/28 130G -1908 (Locobase 6896)

Data from IGN 2 - 1923 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

Two years after Baldwin filled in the last of the 85-ton Ten-wheelers described in Locobase 6894, the I & GN went to still another builder for similar locomotives with more evaporative heating surface. Locobase can't tell why the firebox heating surface was so high; it's almost 60 sq ft more than we found in the 14 Baldwins built to the same design in 1909 and 1911; see Locobase 13792.

Like the other 4-6-0s, these were superheated later; see Locobase 6897.


Class T 20/28 130Gs (Locobase 6895)

Data from IGN 2 - 1923 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

As with the earlier Cooke rebuilds, superheating the 1900-1901 Ten-wheelers (Locobase 6894) yielded a considerable increase in power because the relatively large amount of boiler given over to the superheater.


Class T 20/28 130Gs2 (Locobase 6897)

Data from IGN 2 - 1923 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

The Brooks and Baldwin Ten-wheelers that came on the road in 1908 and 1909 were slightly larger versions of the more numerous 65-ton 4-6-0s. So when they were superheated later on, their superheaters were identical to the earlier group, but total heating surface was a bit more.

The tender's oil-fuel capacity was rated at 60 barrels (2,520 US gallons).


Class TN 63 - 30.2 (Locobase 7760)

Data from MP SUBS 7 -1935 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

As noted in Locobase 6894, Rogers supplied 4 relatively large Ten-wheelers that set the pattern for the most numerouse I & GN class. That entry has information about succeeding locomotives in the class.

This entry shows what happened when the I & GN superheated the original series of locomotives. Although the conversion reduced the number of small tubes by 107, overall heating surface area increased by 179 sq ft and almost 1 in 5 of that total was superheated. A few rode on 68" drivers, but were otherwise similar.


Class TN-56 (Locobase 10037)

Data from MP 1924 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 18, p. 10. Works numbers were 13642-13644, 13646, 13663, 13665, 13671, 13673-13674, 13686-13688, 13694, 13697 in August 1893; and 13706-13707, 13710, 13715, 13721-13722, 13728-13729, 13731, 13739, 13742, 13747, 13759 in September.

This set of orders sent locomotives to the Missouri Pacific (the August batch) and the affiliated Saint Louis, Iron Mountain & Southern (September) as their 668 class. Compared to the slightly earlier deliveries shown in Locobase 10039, this Ten-wheeler had two fewer tubes, but was otherwise identical.

2601 was sold to the Graysonia, Nashville & Ashdown


Class TN-56 - 2657 (Locobase 10039)

Data from MP 1924 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 16, p. 142. Works numbers were 11130, 11334-11335, 11338-11339, 11341-11342, 11344-11345, 11365, 11387, 11392, 11394, 11400 in November 1890; 11413-1141 and 11431 in December;

The first of a series of Baldwin Ten-wheeler orders supplied to the StLIM&S and Missouri Pacific in the 1890s (see Locobases 10037-10038 for the later variants). The first six went directly to the MoPac, the other ten to the IM&S.

The railroad later raised the boiler setting to 150 psi and fitted the drivers with 3 1/2" (89 mm) tires that increased driver diameter to 56" (1,422 mm).

These and the 1892 locomotives differed only in driver diameter and then not by much. A few -- 2661, 2664, 2665, 2668 -- were later refitted with 61" drivers.

All were retired in 1929-1937


Class TN-57 - 239 (Locobase 7754)

Data from MP SUBS 7 - 1935 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. For an fascinating article on the Artesian Belt, see Carl Codney and Jim King, "A Road to Nowhere - Charles Simmons and the Artesian Belt Railroad". (http://codney.tnorr.com/simmons.htm) - it's well worth finding and reading it.

As noted in Locobase 13903, the 235 originally came on the scene as the Artesian Belt's #2. Eight years later, the AB, in its newer identity as the San Antonio Southern, sold the 2 to the Fort Smith & Western, which renumbered it 21. The FS & W sold it to locomotive rebuilder Southern Iron & Equipment, which sold it to the San Antonio, Uvalde & Gulf in 1923 as their #32. And when the MP took over the Link Line two years later, they renumbered it 235.

At some point the saturated boiler had been superseded by a superheated vessel with smaller-diameter tubes and a clutch of flues for the superheater elements. Driver diameter increased first to 57", then in 1931 to 58".


Class TN-61 (Locobase 10034)

Data from MP 1924 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

These were among the last locomotives to be built by Brooks under its independent works number system; the engines were numbered 3702-3703, 3707, 3712-3715, 3735-3742, 3792-3816, 3846-3864. Before the class was complete in 1902, Brooks had delivered both piston-valve and slide-valve versions. See Locobase 12561 for the few Baldwins that shared this class ID.

The relatively low axle loading meant that while most were scrapped before World War II, a couple survived until 1955 because bridges on many branch lines could not support anything larger.


Class TN-61 (Locobase 12561)

Data from MP 1924 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 24, p. 93 . Works numbers were 19679-19680 in November 1901.

Locobase 10034 shows the large Brooks batches that possessed identical power dimensions, but had smaller boilers and larger fireboxes. The Baldwin specs showed 350 13-ft long tubes measuring a total of 2,367 sq ft and a small firebox of 135 sq ft. Together, that amounted to a sizable 2,502 sq ft, considerably larger than equivalent dimensions in the Brooks engines.

It's not clear if these were delivered with Walschaert gear, but the 1924 diagrams affirm that they used the outside radial gear system by then. Moreover, they appear to have received boilers with fewer, but longer tubes (18" longer), which in the 2403 yielded the heating surfaces shown in Locobase.

The relatively low axle loading meant that while most were scrapped before World War II, a couple survived until 1955 because bridges on many branch lines could not support anything larger.


Class TN-63 - 252 (Locobase 7096)

Data from MP 1953ca Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. 25887-25888 in June 1905; 25961 in July; 27134-27135, 27151-27152 in December; 32052-32053, 32071-32072 in October 1907; 32118 in November.

Small Ten-wheelers for an MP subsidiary. Baldwin delivered these Ten-wheelers and the Eight-wheelers shown in Locobase 7769 with equipment from several suppliers, according to the Railroad Gazette of 27 October 1905 (p. 132).

Tower couplers

Pyle-National electric headlights

Monitor injectors

Ajax journal bearings

Richardson valve rod packings

Baldwin standard safety valves

Leach sanding devices

Detroit sight-feed lubricators

Safety steam heat equipment

Midvale driving and truck wheel tires

At least two were later superheated and fitted with 10" piston valves. After the refit, the boiler held 118 2" tubes and 18 5 1/2" flues. Total evaporative heating surface came to 1,265 sq ft while the superheater added 240 sq ft.


Class TN-63- 351 saturated (Locobase 7815)

Data from MP SUBS 7 - 1935 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

This is the large class of Ten-wheelers that were delivered by several builders from 1901 to 1908. Alco's Brooks & Cooke works and Baldwin (works numbers were 29484-29489, 29562, 29580 in November 1911; 29682-29683 in December.)


Class TN-64 (Locobase 10050)

Data from MP 1924 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange. See also DeGolyer, Volume 12, p. 260, and Volume 13, p. 205. Works numbers 7812-7813 in February 1886; 8575-8576, 8584, 8586-8587, 8597 in May 1887.

This octet of mixed-traffic Ten-wheelers gained evaporative heating surface area by resorting to 2 1/4"-diameter tubes. But the grate remained small, the firebox deep and between the rear two driving axles.

7805 was later sold to the Wichita Northwestern, which operated it until the line was abandoned in March 1941.


Class TN-67 - 333 (Locobase 7813)

Data from MP SUBS 7 - 1935 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

Although Alco's Cooke works delivered these three big Ten-wheelers as a trio in 1901-1903, the railroad modified their boilers differently when it came time to install a 26-tube superheater. The 339 had the larger boiler as shown in the specs.


Class TN-67 - 341 (Locobase 7814)

Data from MP SUBS 7 - 1935 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

When Baldwin delivered this set of 10 locomotives in 1906, they were saturated and, most likely, similar to the Cooke engines that came on the road a few years earlier. As they were modified with superheaters and other appurtenances, a few variations appeared. 344 was the only one with a Roach steam chest (most likely a modified slide valve); the others received 11" piston valves. Two of the class (347, 350) received Walschaert valve gear; the others all retained their Stephenson link motion.


Class TN-67 - 371 (Locobase 7817)

Data from MP SUBS 7 - 1935 Locomotive Diagrams supplied in May 2005 by Allen Stanley from his extensive Rail Data Exchange.

These were identical to the upgrades to the original 41-locomotive order of the early 1900s (Locobase 7815), but built new by the IGN in the 1920s. Obviously the balance of power and size was just what the I & GN wanted.

Principal Dimensions by Steve Llanso of Sweat House Media
Class1101 / 1601111/421/2806141721
Locobase ID10,051 10,042 10,041 11,865 11,690
RailroadMissouri Pacific (MP)Missouri Pacific (MP)Kansas City, Wyandotte & Northwestern (MP)Little Rock & Fort Smith (MP)Kansas City, Wyandotte & Northwestern (MP)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class292222
Road Numbers1101-14, 1601-29/7501-29111-119/421-430, 435-445/2806-282014-15 / 2734-273517-18/2822-282321-22/152-153/1241-1242/1287-1288/1167
GaugeStdStdStdStdStd
Number Built292222
BuilderBrooksRogersBurnham, Parry, Williams & CoBurnham, Parry, Williams & CoBurnham, Parry, Williams & Co
Year19011880188918861890
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)14 / 4.2713.33 / 4.0613.5010 / 3.0511.50 / 3.51
Engine Wheelbase (ft / m)24.42 / 7.4424.04 / 7.3323.8320.15 / 6.1422.17 / 6.76
Ratio of driving wheelbase to overall engine wheebase 0.57 0.55 0.57 0.50 0.52
Overall Wheelbase (engine & tender) (ft / m)53.21 / 16.2247.33 / 14.43
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)112,000 / 50,80268,000 / 30,84490,000 / 40,82364,000 / 29,03090,000 / 40,823
Engine Weight (lbs / kg)144,850 / 65,70396,000 / 43,545114,000 / 51,71085,000 / 38,555115,000 / 52,163
Tender Loaded Weight (lbs / kg)98,800 / 44,81562,000 / 28,12374,000 / 33,566
Total Engine and Tender Weight (lbs / kg)243,650 / 110,518158,000 / 71,668188,000 / 85,276
Tender Water Capacity (gals / ML)5000 / 18.943600 / 13.643000 / 11.363500 / 13.26
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)9 / 8.208 / 7.3010 / 9.10
Minimum weight of rail (calculated) (lb/yd / kg/m)62 / 3138 / 1950 / 2536 / 1850 / 25
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)69 / 175356.75 / 144356 / 142254 / 137256 / 1422
Boiler Pressure (psi / kPa)200 / 13.80140 / 9.70130 / 9130 / 9130 / 9
High Pressure Cylinders (dia x stroke) (in / mm)19" x 26" / 483x66018" x 24" / 457x61019" x 24" / 483x61018" x 24" / 457x61018" x 24" / 508x610
Tractive Effort (lbs / kg)23,125 / 10489.3416,306 / 7396.2917,096 / 7754.6215,912 / 7217.5715,344 / 6959.93
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.84 4.17 5.26 4.02 5.87
Heating Ability
Firebox Area (sq ft / m2)177 / 16.45115 / 10.69136 / 12.64127 / 11.80142 / 13.20
Grate Area (sq ft / m2)32.50 / 3.0215.50 / 1.4416.50 / 1.5322.60 / 2.1022.90 / 2.13
Evaporative Heating Surface (sq ft / m2)2003 / 186.151445 / 134.291700 / 157.991401 / 130.161905 / 177.04
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2003 / 186.151445 / 134.291700 / 157.991401 / 130.161905 / 177.04
Evaporative Heating Surface/Cylinder Volume234.76204.43215.85198.20269.50
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation65002170214529382977
Same as above plus superheater percentage65002170214529382977
Same as above but substitute firebox area for grate area35,40016,10017,68016,51018,460
Power L177853784366733704489
Power MT459.72368.04269.48348.26329.88

Principal Dimensions by Steve Llanso of Sweat House Media
Class21 / C-3-D250125163/2832629 / 2702 / TN-61
Locobase ID12,712 10,035 10,036 10,043 10,040
RailroadSaint Louis, Brownsville & Mexico (MP)Missouri Pacific (MP)Saint Louis, Iron Mountain & Southern (MP)Kansas City, Watkins & Gulf (MP)Saint Louis, Iron Mountain & Southern (MP)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class51510435
Road Numbers21-25 / 52-562501-2515765-774 / 2516-25253-6/2832-2835629-657 / 2701-2727
GaugeStdStdStdStdStd
Number Built51510435
BuilderBurnham, Williams & CoRogersCookeRogersBurnham, Parry, Williams & Co
Year19041898190018851889
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)14 / 4.2712.42 / 3.7912.50 / 3.8111.50 / 3.51
Engine Wheelbase (ft / m)25 / 7.6223.33 / 7.1123.33 / 7.1122.25 / 6.78
Ratio of driving wheelbase to overall engine wheebase 0.56 0.53 0.54 0.52
Overall Wheelbase (engine & tender) (ft / m)50.45 / 15.3850.45 / 15.3848.47 / 14.77
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)114,500 / 51,936109,600 / 49,714109,600 / 49,71474,000 / 33,56690,000 / 40,823
Engine Weight (lbs / kg)140,000 / 63,503147,300 / 66,814147,300 / 66,81498,000 / 44,452115,000 / 52,163
Tender Loaded Weight (lbs / kg)93,700 / 42,50293,700 / 42,50266,000 / 29,93778,000 / 35,380
Total Engine and Tender Weight (lbs / kg)241,000 / 109,316241,000 / 109,316164,000 / 74,389193,000 / 87,543
Tender Water Capacity (gals / ML)5000 / 18.944000 / 15.154000 / 15.153600 / 13.64
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)2500 / 9.509 / 8.209 / 8.202500 / 9.50
Minimum weight of rail (calculated) (lb/yd / kg/m)64 / 3261 / 30.5061 / 30.5041 / 20.5050 / 25
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)62 / 157561 / 154961 / 154957 / 144861 / 1549
Boiler Pressure (psi / kPa)180 / 12.40180 / 12.40190 / 13.10140 / 9.70150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)20" x 26" / 508x66020" x 24" / 508x61020" x 24" / 508x61018" x 24" / 457x61019" x 24" / 483x610
Tractive Effort (lbs / kg)25,665 / 11641.4624,079 / 10922.0625,416 / 11528.5216,234 / 7363.6318,109 / 8214.11
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.46 4.55 4.31 4.56 4.97
Heating Ability
Firebox Area (sq ft / m2)187.50 / 17.43160 / 14.87160 / 14.87145 / 13.48
Grate Area (sq ft / m2)29 / 2.7029 / 2.7018 / 1.6723.70 / 2.20
Evaporative Heating Surface (sq ft / m2)2124 / 197.402101 / 195.262086 / 193.871546 / 143.681915 / 177.97
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)2124 / 197.402101 / 195.262086 / 193.871546 / 143.681915 / 177.97
Evaporative Heating Surface/Cylinder Volume224.67240.76239.04218.71243.15
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5220551025203555
Same as above plus superheater percentage5220551025203555
Same as above but substitute firebox area for grate area33,75028,80030,40021,750
Power L16023608363885112
Power MT347.91367.08385.49375.67

Principal Dimensions by Steve Llanso of Sweat House Media
Class668/TN-56 - 26267701T 17/24 64BT 18/24 86DT 18/24 96E
Locobase ID10,038 10,052 6786 6890 6891
RailroadSaint Louis, Iron Mountain & Southern (MP)Missouri Pacific (MP)International & Great Northern (MP)International & Great Northern (MP)International & Great Northern (MP)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class301010109
Road Numbers668-697/2626-26557701-771061-70/71-80/202-209, 201, 210110-1192156-2164
GaugeStdStdStdStdStd
Number Built301010109
BuilderBurnham, Williams & CoRogersPittsburghSchenectadyCooke
Year18921899188118901892
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.50 / 3.5112.45 / 3.7912.83 / 3.9111 / 3.3512.17 / 3.71
Engine Wheelbase (ft / m)22.25 / 6.7823.33 / 7.1123.20 / 7.0720.92 / 6.3822.50 / 6.86
Ratio of driving wheelbase to overall engine wheebase 0.52 0.53 0.55 0.53 0.54
Overall Wheelbase (engine & tender) (ft / m)48.37 / 14.7450.48 / 15.3947.62 / 14.5148.17 / 14.6847.42 / 14.45
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)100,450 / 45,563109,600 / 49,71464,000 / 29,03086,000 / 39,00996,500 / 43,772
Engine Weight (lbs / kg)120,800 / 54,794147,300 / 66,81490,000 / 40,823108,000 / 48,988126,500 / 57,380
Tender Loaded Weight (lbs / kg)87,200 / 39,55393,700 / 42,50288,000 / 39,91688,000 / 39,91697,500 / 44,225
Total Engine and Tender Weight (lbs / kg)208,000 / 94,347241,000 / 109,316178,000 / 80,739196,000 / 88,904224,000 / 101,605
Tender Water Capacity (gals / ML)4000 / 15.154000 / 15.154000 / 15.154000 / 15.154500 / 17.05
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)9 / 8.209 / 8.209 / 8.209 / 8.2010 / 9.10
Minimum weight of rail (calculated) (lb/yd / kg/m)56 / 2861 / 30.5036 / 1848 / 2454 / 27
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 142267 / 170257 / 144855 / 139755 / 1397
Boiler Pressure (psi / kPa)165 / 11.40180 / 12.40160 / 11140 / 9.70160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)20" x 24" / 508x61020" x 24" / 508x61017" x 24" / 432x61018" x 24" / 457x61018" x 24" / 457x610
Tractive Effort (lbs / kg)24,043 / 10905.7321,922 / 9943.6616,549 / 7506.5116,824 / 7631.2519,228 / 8721.68
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.18 5.00 3.87 5.11 5.02
Heating Ability
Firebox Area (sq ft / m2)128.80 / 11.97175 / 16.26105 / 9.76116 / 10.78214 / 19.89
Grate Area (sq ft / m2)23.50 / 2.1828.70 / 2.6715.50 / 1.4424.50 / 2.2828 / 2.60
Evaporative Heating Surface (sq ft / m2)1871 / 173.822101 / 195.261433 / 133.181397 / 129.831586 / 147.40
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1871 / 173.822101 / 195.261433 / 133.181397 / 129.831586 / 147.40
Evaporative Heating Surface/Cylinder Volume214.40240.76227.28197.64224.37
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation38785166248034304480
Same as above plus superheater percentage38785166248034304480
Same as above but substitute firebox area for grate area21,25231,50016,80016,24034,240
Power L144386855472035895511
Power MT292.21413.67487.77276.01377.71

Principal Dimensions by Steve Llanso of Sweat House Media
ClassT 18/24 96EsT 18/28 88JT 19/24 104KT 19/24 118HT 19/24 98F
Locobase ID6892 6898 6900 6899 6893
RailroadInternational & Great Northern (MP)International & Great Northern (MP)International & Great Northern (MP)International & Great Northern (MP)International & Great Northern (MP)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class5661018
Road Numbers122, 123, 128301-306307-312145-154266-280 / 5252-5269
GaugeStdStdStdStdStd
Number Built661018
BuilderCookeCookeRhode IslandCookeRogers
Year19241901190219011898
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)12.17 / 3.7112.75 / 3.8912.75 / 3.8912 / 3.6612 / 3.66
Engine Wheelbase (ft / m)22.50 / 6.8623.50 / 7.1623.50 / 7.1622.50 / 6.8622.42 / 6.83
Ratio of driving wheelbase to overall engine wheebase 0.54 0.54 0.54 0.53 0.54
Overall Wheelbase (engine & tender) (ft / m)47.67 / 14.5356.33 / 17.1756.33 / 17.1752.33 / 15.9550.76 / 15.47
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)96,500 / 43,77288,000 / 39,916104,000 / 47,174118,000 / 53,52498,000 / 44,452
Engine Weight (lbs / kg)126,500 / 57,380142,000 / 64,410148,000 / 67,132150,000 / 68,039130,000 / 58,967
Tender Loaded Weight (lbs / kg)97,500 / 44,225123,000 / 55,792125,000 / 56,699110,000 / 49,895110,000 / 49,895
Total Engine and Tender Weight (lbs / kg)224,000 / 101,605265,000 / 120,202273,000 / 123,831260,000 / 117,934240,000 / 108,862
Tender Water Capacity (gals / ML)4500 / 17.054500 / 17.056600 / 255500 / 20.835000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)10 / 9.1012 / 10.9012 / 10.9012 / 10.9012 / 10.90
Minimum weight of rail (calculated) (lb/yd / kg/m)54 / 2749 / 24.5058 / 2966 / 3354 / 27
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)55 / 139773 / 185463 / 160057 / 144857 / 1448
Boiler Pressure (psi / kPa)180 / 12.40190 / 13.10190 / 13.10170 / 11.70170 / 11.70
High Pressure Cylinders (dia x stroke) (in / mm)18" x 24" / 457x61018" x 28" / 457x71119" x 28" / 483x71119" x 24" / 483x61019" x 24" / 483x610
Tractive Effort (lbs / kg)21,631 / 9811.6720,070 / 9103.6125,912 / 11753.5021,964 / 9962.7121,964 / 9962.71
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.46 4.38 4.01 5.37 4.46
Heating Ability
Firebox Area (sq ft / m2)214 / 19.89184 / 17.10189 / 17.57255 / 23.70214 / 19.89
Grate Area (sq ft / m2)28 / 2.6028 / 2.6027 / 2.5135 / 3.2528 / 2.60
Evaporative Heating Surface (sq ft / m2)1308 / 121.561675 / 155.671675 / 155.671932 / 179.551644 / 152.79
Superheating Surface (sq ft / m2)303 / 28.16
Combined Heating Surface (sq ft / m2)1611 / 149.721675 / 155.671675 / 155.671932 / 179.551644 / 152.79
Evaporative Heating Surface/Cylinder Volume185.04203.11182.29245.31208.74
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation50405320513059504760
Same as above plus superheater percentage59985320513059504760
Same as above but substitute firebox area for grate area45,83934,96035,91043,35036,380
Power L111,9167274568965765565
Power MT816.69546.70361.79368.58375.57

Principal Dimensions by Steve Llanso of Sweat House Media
ClassT 20/28 130 - 1909, 1911T 20/28 130GT 20/28 130G -1908T 20/28 130GsT 20/28 130Gs2
Locobase ID13,792 6894 6896 6895 6897
RailroadInternational & Great Northern (MP)International & Great Northern (MP)International & Great Northern (MP)International & Great Northern (MP)International & Great Northern (MP)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class541101210
Road Numbers252-265201-241242-251201-202242-43, 47, 49, 51-53, 55
GaugeStdStdStdStdStd
Number Built54110
BuilderBaldwinseveralAlco-BrooksIGNBrooks
Year1909190019081908
Valve GearStephensonStephensonStephensonStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)13 / 3.9613 / 3.9613 / 3.9613 / 3.9613 / 3.96
Engine Wheelbase (ft / m)23 / 7.0123.83 / 7.2623.83 / 7.2623.83 / 7.2623.83 / 7.26
Ratio of driving wheelbase to overall engine wheebase 0.57 0.55 0.55 0.55 0.55
Overall Wheelbase (engine & tender) (ft / m)56.50 / 17.2253.83 / 16.4156.50 / 17.2253.83 / 16.4156.50 / 17.22
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)134,000 / 60,781130,000 / 58,967134,000 / 60,781130,000 / 58,967134,000 / 60,781
Engine Weight (lbs / kg)174,000 / 78,925162,000 / 73,482174,000 / 78,925170,000 / 77,111174,000 / 78,925
Tender Loaded Weight (lbs / kg)130,000114,000 / 51,710136,000 / 61,689114,000 / 51,710136,000 / 61,689
Total Engine and Tender Weight (lbs / kg)304,000276,000 / 125,192310,000 / 140,614284,000 / 128,821310,000 / 140,614
Tender Water Capacity (gals / ML)6000 / 34.095500 / 20.835000 / 18.945500 / 20.835000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)3000 / 11.1012 / 10.9013 / 11.8012 / 10.9013 / 11.80
Minimum weight of rail (calculated) (lb/yd / kg/m)74 / 3772 / 3674 / 3772 / 3674 / 37
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)62 / 160063 / 160063 / 160063 / 160063 / 1600
Boiler Pressure (psi / kPa)200 / 13.80190 / 13.10190 / 13.10190 / 13.10190 / 13.10
High Pressure Cylinders (dia x stroke) (in / mm)20" x 28" / 508x71120" x 28" / 508x71120" x 28" / 508x71120" x 28" / 508x71120" x 28" / 508x711
Tractive Effort (lbs / kg)30,710 / 13929.8428,711 / 13023.1128,711 / 13023.1128,711 / 13023.1128,711 / 13023.11
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.36 4.53 4.67 4.53 4.67
Heating Ability
Firebox Area (sq ft / m2)198.80 / 18.47245 / 22.77254 / 23.61255 / 23.70254 / 23.61
Grate Area (sq ft / m2)34 / 3.1635 / 3.2534 / 3.1635 / 3.2534 / 3.16
Evaporative Heating Surface (sq ft / m2)2587 / 240.342481 / 230.582657 / 246.931880 / 174.721999 / 185.78
Superheating Surface (sq ft / m2)494 / 45.91494 / 45.91
Combined Heating Surface (sq ft / m2)2587 / 240.342481 / 230.582657 / 246.932374 / 220.632493 / 231.69
Evaporative Heating Surface/Cylinder Volume254.10243.69260.97184.66196.34
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation68006650646066506460
Same as above plus superheater percentage68006650646080477752
Same as above but substitute firebox area for grate area39,76046,55048,26058,62557,912
Power L172697262769514,89415,118
Power MT358.78369.46379.80757.74746.18

Principal Dimensions by Steve Llanso of Sweat House Media
ClassTN 63 - 30.2TN-56TN-56 - 2657TN-57 - 239TN-61
Locobase ID7760 10,037 10,039 7754 10,034
RailroadInternational & Great Northern (MP)Missouri Pacific (MP)Saint Louis, Iron Mountain & Southern (MP)Missouri Pacific (MP)Missouri Pacific (MP)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class3315161101
Road Numbers311-313750-765/ 2601-2615975-980, 658-667/2657-26722352301-2401
GaugeStdStdStdStdStd
Number Built1516101
BuilderseveralBurnham, Williams & CoBurnham, Parry, Williams & CoMPBrooks
Year19241893189019211900
Valve GearStephensonStephensonStephensonWalschaertStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)13 / 3.9611.50 / 3.5111.50 / 3.5112 / 3.6614 / 4.27
Engine Wheelbase (ft / m)23.83 / 7.2622.25 / 6.7822.17 / 6.7623.13 / 7.0524.17 / 7.37
Ratio of driving wheelbase to overall engine wheebase 0.55 0.52 0.52 0.52 0.58
Overall Wheelbase (engine & tender) (ft / m)53.83 / 16.4148.37 / 14.7448.19 / 14.6952.50 / 1653.19 / 16.21
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)130,000 / 58,967100,450 / 45,56391,800 / 41,640113,280 / 51,383122,500 / 55,565
Engine Weight (lbs / kg)170,000 / 77,111120,800 / 54,794117,500 / 53,297139,080 / 63,086154,000 / 69,853
Tender Loaded Weight (lbs / kg)114,000 / 51,71087,200 / 39,55386,600 / 39,281113,494 / 51,480106,500 / 48,308
Total Engine and Tender Weight (lbs / kg)284,000 / 128,821208,000 / 94,347204,100 / 92,578252,574 / 114,566260,500 / 118,161
Tender Water Capacity (gals / ML)5500 / 20.833600 / 13.644000 / 15.156000 / 22.735000 / 18.94
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)12 / 10.909 / 8.209 / 8.202741 / 10.402800 / 10.60
Minimum weight of rail (calculated) (lb/yd / kg/m)72 / 3656 / 2851 / 25.5063 / 31.5068 / 34
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 160056 / 142255 / 139757 / 144861 / 1549
Boiler Pressure (psi / kPa)200 / 13.80150 / 10.30130 / 9190 / 13.10200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)20" x 28" / 508x71120" x 24" / 508x61020" x 24" / 508x61018" x 26" / 457x66019.5" x 28" / 495x711
Tractive Effort (lbs / kg)30,222 / 13708.4821,857 / 9914.1819,287 / 8748.4523,868 / 10826.3629,672 / 13459.01
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.30 4.60 4.76 4.75 4.13
Heating Ability
Firebox Area (sq ft / m2)255 / 23.70128.80 / 11.97138 / 12.73150 / 13.94161 / 14.96
Grate Area (sq ft / m2)34 / 3.1623.50 / 2.1823.30 / 2.1625 / 2.3232.40 / 3.01
Evaporative Heating Surface (sq ft / m2)1869 / 173.701871 / 173.821901 / 176.701444 / 134.202269 / 210.87
Superheating Surface (sq ft / m2)494 / 45.91289 / 26.86
Combined Heating Surface (sq ft / m2)2363 / 219.611871 / 173.821901 / 176.701733 / 161.062269 / 210.87
Evaporative Heating Surface/Cylinder Volume183.58214.40217.84188.57234.44
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation68003525302947506480
Same as above plus superheater percentage82283525302955586480
Same as above but substitute firebox area for grate area61,71019,32017,94033,34532,200
Power L115,6554035353811,3026458
Power MT796.46265.67254.90659.87348.67

Principal Dimensions by Steve Llanso of Sweat House Media
ClassTN-61TN-63 - 252TN-63- 351 saturatedTN-64TN-67 - 333
Locobase ID12,561 7096 7815 10,050 7813
RailroadMissouri Pacific (MP)Saint Louis, Brownsville & Mexico (MP)International & Great Northern (MP)Missouri Pacific (MP)International & Great Northern (MP)
CountryUSAUSAUSAUSAUSA
Whyte4-6-04-6-04-6-04-6-04-6-0
Number in Class21241211
Road Numbers2402-2403251-262315-360277-284/7801-7808333, 339, 351-53, 355-60
GaugeStdStdStdStdStd
Number Built212412
BuilderBurnham, Williams & CoBurnham, Williams & CoseveralBurnham, Parry, Williams & CoAlco-Cooke
Year19011905190118861928
Valve GearStephensonStephensonStephensonStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.50 / 4.1114 / 4.2713 / 3.9614.50 / 4.4213 / 3.96
Engine Wheelbase (ft / m)24.33 / 7.4224.75 / 7.5423.83 / 7.2625.79 / 7.8623.83 / 7.26
Ratio of driving wheelbase to overall engine wheebase 0.55 0.57 0.55 0.56 0.55
Overall Wheelbase (engine & tender) (ft / m)49.33 / 15.0456.50 / 17.2250 / 15.2458.25 / 17.75
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)133,000 / 60,32895,840 / 43,472140,000 / 63,50390,975 / 41,266148,000 / 67,132
Engine Weight (lbs / kg)167,000 / 75,750127,040 / 57,624174,000 / 78,925126,150 / 57,221182,000 / 82,554
Tender Loaded Weight (lbs / kg)98,000 / 44,452104,000 / 47,174136,000 / 61,68984,050 / 38,124161,000 / 73,028
Total Engine and Tender Weight (lbs / kg)265,000 / 120,202231,040 / 104,798310,000 / 140,614210,200 / 95,345343,000 / 155,582
Tender Water Capacity (gals / ML)5000 / 18.9445006000 / 22.733600 / 13.648000 / 30.30
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)9 / 8.2023002520 / 9.509 / 8.203360 / 12.70
Minimum weight of rail (calculated) (lb/yd / kg/m)74 / 3753 / 26.5078 / 3951 / 25.5082 / 41
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)61 / 154963 / 160064 / 162663 / 160067 / 1702
Boiler Pressure (psi / kPa)200 / 13.80180 / 12.40190 / 13.10160 / 11210 / 14.50
High Pressure Cylinders (dia x stroke) (in / mm)19.5" x 28" / 495x71119" x 24" / 483x61020" x 28" / 508x71120" x 24" / 508x61021" x 28" / 533x711
Tractive Effort (lbs / kg)29,672 / 13459.0121,041 / 9544.0528,263 / 12819.9020,724 / 9400.2632,897 / 14921.85
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.48 4.55 4.95 4.39 4.50
Heating Ability
Firebox Area (sq ft / m2)163 / 12.55133 / 12.36254 / 23.61138 / 12.83254 / 23.61
Grate Area (sq ft / m2)33 / 3.0717.04 / 1.5834 / 3.1619.70 / 1.8334 / 3.16
Evaporative Heating Surface (sq ft / m2)2493 / 232.531715 / 159.392276 / 211.521876 / 174.351988 / 184.76
Superheating Surface (sq ft / m2)494 / 45.91
Combined Heating Surface (sq ft / m2)2493 / 232.531715 / 159.392276 / 211.521876 / 174.352482 / 230.67
Evaporative Heating Surface/Cylinder Volume257.58217.76223.55214.97177.11
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation66003067646031527140
Same as above plus superheater percentage66003067646031528568
Same as above but substitute firebox area for grate area32,60023,94048,26022,08064,008
Power L1695057117059494016,095
Power MT345.61394.11333.48359.14719.26

Principal Dimensions by Steve Llanso of Sweat House Media
ClassTN-67 - 341TN-67 - 371
Locobase ID7814 7817
RailroadInternational & Great Northern (MP)International & Great Northern (MP)
CountryUSAUSA
Whyte4-6-04-6-0
Number in Class1114
Road Numbers320, 341-350371-384
GaugeStdStd
Number Built14
BuilderIGNIGN
Year19241923
Valve GearStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)13 / 3.9613 / 3.96
Engine Wheelbase (ft / m)23.83 / 7.2623.83 / 7.26
Ratio of driving wheelbase to overall engine wheebase 0.55 0.55
Overall Wheelbase (engine & tender) (ft / m)56.50 / 17.2258.25 / 17.75
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)130,000 / 58,967148,000 / 67,132
Engine Weight (lbs / kg)170,000 / 77,111182,000 / 82,554
Tender Loaded Weight (lbs / kg)126,000 / 57,153161,000 / 73,028
Total Engine and Tender Weight (lbs / kg)296,000 / 134,264343,000 / 155,582
Tender Water Capacity (gals / ML)5600 / 21.218000 / 30.30
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)2520 / 9.503360 / 12.70
Minimum weight of rail (calculated) (lb/yd / kg/m)72 / 3682 / 41
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)64 / 162667 / 1702
Boiler Pressure (psi / kPa)190 / 13.10200 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)20" x 28" / 508x71121" x 28" / 533x711
Tractive Effort (lbs / kg)28,263 / 12819.9031,331 / 14211.52
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.60 4.72
Heating Ability
Firebox Area (sq ft / m2)254 / 23.61254 / 23.61
Grate Area (sq ft / m2)34 / 3.1634 / 3.16
Evaporative Heating Surface (sq ft / m2)1868 / 173.611988 / 184.76
Superheating Surface (sq ft / m2)494 / 45.91494 / 45.91
Combined Heating Surface (sq ft / m2)2362 / 219.522482 / 230.67
Evaporative Heating Surface/Cylinder Volume183.48177.11
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation64606800
Same as above plus superheater percentage78178160
Same as above but substitute firebox area for grate area58,39560,960
Power L115,09715,328
Power MT768.07684.98

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